1.Win7专业版64位先安装SP1补丁
2.根证书下载 MicrosoftRootCertificateAuthority2011.cer
链接:http://go.microsoft.com/fwlink/?LinkID=747875&clcid=0x409
3.NET4.7.2离线下载和安装
链接:https://support.microsoft.com/en-us/help/4054530/microsoft-net-framework-4-7-2-offline-installer-for-windows
4.安装AutoCAD2019
.net安装参考:https://www.cnblogs.com/3tai/p/6046711.html
证书安装参考:https://blog.csdn.net/inchat/article/details/104294302